Update app.py

app.py

@@ -134,15 +134,21 @@ async def root_head():
 def normalize_model(model: str):
 
     if not model:
-        return "gpt-4o-mini"
+        return "gpt-4"
 
     model_lower = model.lower()
 
     # GPT
-    if "gpt-4" in model_lower:
+    if model_lower == "gpt-4":
         return "gpt-4"
 
-    if "gpt-3.5" in model_lower:
+    if model_lower == "gpt-4o":
+        return "gpt-4o"
+
+    if model_lower == "gpt-4o-mini":
+        return "gpt-4o-mini"
+
+    if model_lower == "gpt-3.5-turbo":
         return "gpt-3.5-turbo"
 
     # Claude
@@ -153,13 +159,13 @@ def normalize_model(model: str):
     if "gemini" in model_lower:
         return "gemini"
 
-    # Cohere / Command
-    if "command-r-plus" in model_lower:
-        return "command-r-plus"
-
-    if "command-r" in model_lower:
+    # Command
+    if model_lower == "command-r":
         return "command-r"
 
+    if model_lower == "command-r-plus":
+        return "command-r-plus"
+
     # Grok
     if "grok" in model_lower:
         return "gpt-4"
@@ -195,22 +201,27 @@ async def get_models():
 
     visible_models = [
 
+        # GPT
         "gpt-4",
         "gpt-4-turbo",
         "gpt-4o",
         "gpt-4o-mini",
         "gpt-3.5-turbo",
 
+        # Claude
         "claude-sonnet-4-6",
         "claude-opus-4",
         "claude-3-7-sonnet",
 
+        # Gemini
         "gemini-2.5-pro",
         "gemini-2.5-flash",
 
+        # Cohere
         "command-r",
         "command-r-plus",
 
+        # Other
         "grok-4",
         "llama-3-70b",
         "mistral-7b"
@@ -222,7 +233,10 @@ async def get_models():
             "id": model,
             "object": "model",
             "created": int(time.time()),
-            "owned_by": "g4f"
+            "owned_by": "openai",
+            "permission": [],
+            "root": model,
+            "parent": None
         })
 
     return {
@@ -259,10 +273,6 @@ async def chat_completions(
         f"Request model={model} stream={body.stream}"
     )
 
-    # =================================================
-    # STREAMING
-    # =================================================
-
     if body.stream:
 
         def generate_stream():
@@ -279,6 +289,8 @@ async def chat_completions(
                     stream=True
                 )
 
+                has_content = False
+
                 for chunk in response:
 
                     try:
@@ -302,6 +314,8 @@ async def chat_completions(
                         if not content:
                             continue
 
+                        has_content = True
+
                         payload = {
                             "id": chunk_id,
                             "object": "chat.completion.chunk",
@@ -333,6 +347,18 @@ async def chat_completions(
                             f"Chunk error: {chunk_error}"
                         )
 
+                if not has_content:
+
+                    yield (
+                        "data: "
+                        + json.dumps({
+                            "error": {
+                                "message": "Empty response"
+                            }
+                        })
+                        + "\n\n"
+                    )
+
                 final_payload = {
                     "id": chunk_id,
                     "object": "chat.completion.chunk",
@@ -383,10 +409,6 @@ async def chat_completions(
             }
         )
 
-    # =================================================
-    # NORMAL
-    # =================================================
-
     try:
 
         client = create_client()